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Finding the Fourth Proportional to 3,620.52, 5,420.98 and 2,836.40

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Solution

The fourth proportional to 3,620.52, 5,420.98 and 2,836.40 is: 4,246.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.52 : 5,420.98 = 2,836.40 : x
  2. Step 2: Convert to fraction form
    3,620.52/5,420.98 = 2,836.40/x
  3. Step 3: Cross multiply
    3,620.52x = 5,420.98 × 2,836.40
  4. Step 4: Simplify right side
    3,620.52x = 15,376,067.67
  5. Step 5: Solve for x
    x = 15,376,067.67/3,620.52
  6. Step 6: Final answer
    x = 4,246.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.